Date: 18/4/2020

Right, so I have written my Tides program in python and the current plan is for the raspi itself to run the program and then MMM-JsonTable to take the local JSON file that the program outputs and display that. However there are two main issues here:

1. I can find any way for the raspi to run the program
I could use crontab, however if it happens to be off when its supposed to update then that days tides will not work. 
I could also try and hack the module and get it to call and run my script but that seems complicated. If it ain't broke, don't fix it!

2. There doesn't seem to be support for MMM-JsonTable to display a local JSON file. I loaded one into the raspi, but it didn't want to display it - the module just came up empty on my screen. This seems like quite a major flaw in my plans and may require a whole rethink!